Compilare: user.cpp: In function ‘void ciur()’: user.cpp:42:13: warning: unused variable ‘n’ [-Wunused-variable] int i,j,n,m,x; ^ user.cpp:42:15: warning: unused variable ‘m’ [-Wunused-variable] int i,j,n,m,x; ^ user.cpp:42:17: warning: unused variable ‘x’ [-Wunused-variable] int i,j,n,m,x; ^ user.cpp: In function ‘int main()’: user.cpp:66:9: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n,m,x; ^ user.cpp:64:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pinex.in","r",stdin); ^ user.cpp:65:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pinex.out","w",stdout); ^ user.cpp:67:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:73:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%d",&a,&b); ^